What would happen if the pay method were not defined as an abstract method in the StaffMember class of the Firm program?
What will be an ideal response?
By defining the pay method in StaffMember, all child classes must implement it (or be abstract themselves). So if pay were not defined in StaffMember, the child classes would not have to implement it and the ability to pay all staff members through a polymorphic reference would not exist. It is only by formally establishing that all children of StaffMember have a pay method that makes it safe to pay them all.
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